44Ti decay gamma-ray emission from young galactic supernova remnants

✍ Scribed by A.F. Iyudin

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 238 KB
• Volume: 654
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)88568-1

✦ Synopsis

The discovery by COMPTEL of the 44Ti line emission at 1.16 MeV from the youngest known Galactic supernova remnant (SNR) Cas A has opened a new window for the investigation of SNR properties. This discovery also shows a way that could help to uncover missing young remnants of Galactic SNe that might have occurred some hundred years ago. Contrary to the situation at other wavelengths, in the 5'-ray band the Galaxy is almost transparent, so that otherwise obscured supernova remnants may be detectable up to A~,-~ 103 in 5'-ray line emission. This is one of the direct ways to complement historical observations of Galactic SNe. Here we present preliminary results of the 6 year 44Ti line emission survey performed by COMPTEL on-board the Compton Gamma-Ray Observatory (CGRO).